#include <iostream>

int globalvar;

void function() {
    // auto int localVar = 10;

    static int staticVar = 20;

    const int constVar = 30;

    class MyClass {
        public:
        mutable int mutableVar;

        void constMemberFunc() const {
            mutableVar = 50;
        }
    };
    thread_local int threadVar = 60;
}

int main() {
    extern int externalVar;
    function();
    return 0;
}